Panjange dinagat Huber

Huber, Bernhard A. & Nuñeza, Olga M., 2015, Evolution of genital asymmetry, exaggerated eye stalks, and extreme palpal elongation in Panjange spiders (Araneae: Pholcidae), European Journal of Taxonomy 169, pp. 1-46 : 30-32

Panjange dinagat Huber sp. nov.

urn:lsid:zoobank.org:act:A711003E-5B76-4450-B9EE-C618A2200483

Figs 11–13 , 74–78

Diagnosis

Easily distinguished from most known relatives (except Pa. marilog Huber sp. nov.) by complex male palpal trochanter apophysis ( Fig. 75 ), and by widening of epigynal scape in mid-section ( Fig. 77 ); from Pa. marilog Huber sp. nov. by male pedipalp ( Figs 74–75 ; relatively wider tibia; shorter whitish elongation of tarsus; different shapes of procursus and appendix; more slender embolus) and female genitalia (longer than wide; Fig. 77 ).

Etymology

The species name is derived from the type locality; noun in apposition.

Type material

PHILIPPINES: holotype Ƌ, in ZFMK ( Ar 13015 ), Dinagat Island, near Libjo, Paragua Forest, “site 1” (10.222°N, 125.553°E), 130 m a.s.l., forest at brook, on leaves, 20 Feb. 2014 (B.A. Huber, P.N. Banaag) .

Other material examined

PHILIPPINES, Dinagat Island: 1 Ƌ, 3 ♀♀, 2 juvs in ZFMK ( Ar 13016 ), same data as holotype ; 1 ♀, 2 juvs in pure ethanol, in ZFMK ( Phi 232 ), same data ; 1 ♀ in ZFMK ( Ar 13017 ), near Libjo, Paragua Forest, “site 2” (10.241°N, 125.545°E), 240 m a.s.l., forest along brook, on leaf, 20 Feb. 2014 (B.A. Huber, P.N. Banaag) .

Description

Male (holotype)

MEASUREMENTS. Total body length 4.4, carapace width 1.0. Leg 1: 33.9 (7.8 + 0.5 + 7.9 + 15.7 + 2.0), tibia 2: 5.0, tibia 3: 2.8, tibia 4: 4.3; tibia 1 L/d: 97. Distance PME–PME 430 µm, diameter PME 90 µm, distance PME–ALE ~50 µm; AME absent.

COLOR. Carapace pale ochre yellow to whitish, without posterior mark, ocular area and clypeus dark brown, with black mark in AME area; sternum whitish; legs ochre-yellow with dark brown patellae and tibia-metatarsus joints; abdomen ochre-gray, with black marks dorsally, monochromous ventrally.

BODY. Habitus as in Fig. 11 ; ocular area raised, each triad on long stalk, with pointed curved process arising from near PME and directed toward anterior ( Fig. 76 ); carapace without median furrow; clypeus with two patches of modiFed hairs: slightly stronger hairs below black mark and distinct Feld of ~20 short spines more distally; sternum wider than long (0.65/0.50), unmodiFed.

CHELICERAE. As in Fig. 76 , with pair of simple, weakly sclerotized processes in rather frontal position directed toward median; without modiFed hairs; without stridulatory ridges.

PALPS. As in Figs 74–75 ; symmetric; coxa with strong ventro-distal rim but otherwise unmodiFed; trochanter relatively long, with simple retrolatero-dorsal process and complex retrolatero-ventral apophysis, distally curved toward prolateral, with two distinctive subdistal branches directed toward distal and retrolateral respectively; femur short, with two short dorsal processes and very indistinct prolateral hump; tibia very thick (width ~70% of length); tarsus with short whitish elongation with terminal tarsal organ; procursus proximal part with rounded ventral process, distal part hinged, with distinctive retrolateral process and simple Fat prolateral process; bulb with strong proximal sclerite, long processes extending in opposite directions (dorsal embolus; ventral appendix), with retrolateral toothed process arising from proximal bulbal sclerite, with small round sclerite between appendix and bulb.

LEGS. Without spines and curved hairs; few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 pseudosegments barely visible in dissecting microscope.

Male (variation)

Tibia 1 in other male: 7.8.

Female

In general similar to male but eye triads on low humps and much closer together (distance PME–PME 220 µm); clypeus unmodiFed. Tibia 1 in 4 females: 5.9, 6.1, 6.1, 6.7. Epigynum weakly sclerotized plate with scape directed toward anterior, scape strongly folded and extensible, with distinctive widening in mid-section ( Fig. 77 ), distal part semitransparent; internal genitalia as in Fig. 78 .

Natural history

The spiders were found on the undersides of large leaves about 0.5–2 m above the ground.

Distribution

Known from type locality on Dinagat Island only ( Fig. 16 ).

Figures

Fig. 16. Known distribution of the Panjange lanthana group.

Figs 2 – 15. Live specimens. 2 – 4. Pa. lanthana, Mt. Isarog, Ƌ, ♀ with eggsac, and penultimate Ƌ. 5. Pa. malagos Huber sp. nov., Ƌ. 6 – 7. Pa. casaroro Huber sp. nov., ƋƋ. 8 – 10. Pa. camiguin Huber sp. nov. 8. ♀ with parasitized eggsac, from Camiguin Island. 9. Ƌ from Bohol Island. 10. Ƌ from Camiguin Island. 11 – 13. Pa. dinagat Huber sp. nov., Ƌ, ♀ with eggsac, and penultimate Ƌ. 14 – 15. Pa. marilog Huber sp. nov., ƋƋ showing color variation.

Figs 74 – 78. Panjange dinagat Huber sp. nov. (ZFMK, Ar 13016). 74 – 75. Left male palp, prolateral and retrolateral views. 76. Male prosoma and chelicerae, frontal view. 77 – 78. Cleared female genitalia, ventral and dorsal views. Abbreviations: a = appendix; b = genital bulb; e = embolus; p = procursus; tr = trochanter. Scale bars: 74 – 76 = 0.5 mm; 77 – 78 = 0.3 mm.